Add junit5 test code for module [linkis-spring-cloud-gateway]

### Add junit5 test code for module [linkis-spring-cloud-gateway]
- Module: linkis-spring-cloud-gateway
- Location:linkis-spring-cloud-services/linkis-spring-cloud-gateway
- Task status:✗(unfinished)/ ✓(finished)
- Test code guide:https://linkis.apache.org/zh-CN/community/how-to-write-unit-test-code/
- Test code example: https://github.com/apache/incubator-linkis/tree/master/linkis-public-enhancements/linkis-publicservice/linkis-jobhistory/src/test
---
- 模块名: linkis-spring-cloud-gateway
- 代码位置:linkis-spring-cloud-services/linkis-spring-cloud-gateway
- 任务状态:✗(unfinished)/ ✓(finished)
- 单测编写指引:https://linkis.apache.org/zh-CN/community/how-to-write-unit-test-code/
- 参考样例: https://github.com/apache/incubator-linkis/tree/master/linkis-public-enhancements/linkis-publicservice/linkis-jobhistory/src/test

| Task status| Class | Type| Level of Difficulty | Note |
| :------ | :------ | :------: | :------: | :------: |
| ✗ |org.apache.linkis.gateway.springcloud.http.SpringCloudHttpUtils| utils | normal | |
| ✗ |org.apache.linkis.gateway.springcloud.http.GatewayAuthorizationFilter| filter | normal | |
| ✗ |org.apache.linkis.gateway.springcloud.websocket.SpringCloudGatewayWebsocketFilter| filter | normal | |
| ✗ |org.apache.linkis.gateway.springcloud.websocket.WebSocketServiceConfiguration| config| normal | |
| ✗ |org.apache.linkis.gateway.springcloud.errorcode.GatewayErrorConstants| Constants| normal | |
| ✗ |org.apache.linkis.gateway.springcloud.http.LinkisGatewayHttpHeadersFilter| filter| normal | |
| ✗ |org.apache.linkis.gateway.springcloud.http.SpringCloudGatewayHttpRequest| request| normal | |
| ✗ |org.apache.linkis.gateway.springcloud.http.SpringCloudGatewayHttpResponse| response| normal | |
| ✗ |org.apache.linkis.gateway.springcloud.websocket.SpringCloudGatewayWebsocketUtils| utils| normal | |